EDM of cast Al/SiC metal matrix nanocomposites by applying response surface method

The newly engineered metal matrix nanocomposite (MMNC) of Al 7075 reinforced with 0.5 wt% SiC nanoparticles was prepared by ultrasonic cavitation method. The high resolution scanning electron micrograph shows uniform distribution and good dispersion of the SiC nanoparticles within the aluminum metal matrix. Electrical discharge machining was employed to machine MMNC with copper electrode by adopting face-centered central composite design of response surface methodology. Analysis of variance was applied to investigate the influence of process parameters and their interactions. Further, a mathematical model has been formulated in order to estimate the machining characteristics.